Protognathus

Leina le raya: “early jaw lizard”1

E jele: DimelaMelala-meleeleBogare jwa Jurassic go ya go Bofelo jwa Jurassic

Protognathosaurus was a big, long-necked plant eater that lived in China during the Middle Jurassic. It is known from just a piece of its lower jaw, so scientists are still figuring out exactly what it looked like.1

E tshetse

dimilione tsa dingwaga di le 171 go ya go 155 tse di fetileng3

Bogare jwa Jurassic go ya go Bofelo jwa Jurassic

Bonako jo bogolo

e ka nna 15 km/h (9 mph)

Go taboga, kakanyo

E tshetse leng?

Triassic

Jurassic

Cretaceous

dimilione tsa dingwaga di le 252 tse di fetileng20114566, asteroiti

E ne e le bonako go le kae?

Motho yo o tsamayang e ka nna 5 km/h (3 mph)

Ngwana mo baesekeleng e ka nna 12 km/h (7 mph)

Protognathus e ka nna 15 km/h (9 mph)

Pitse e e sianang ka bonako e ka nna 65 km/h (40 mph)

Lengau e ka nna 100 km/h (62 mph)

dilo tse di monate

Dintlha tse di monate

Protognathosaurus is known only from a single piece of lower jaw, called a dentary, which had about 18 tooth positions.1

Its name was first Protognathus, but that name was already used for a beetle, so in 1991 it was changed to Protognathosaurus.1

The jaw shows sharp replacement teeth still growing in, which is why the species name oxyodon means 'sharp tooth'.1

It lived about 168 to 161 million years ago, during the Middle Jurassic.1

The fossil was found in the Lower Shaximiao Formation, which is made of sandstone and mudstone from an ancient lake.2

Scientists think it was a medium-sized primitive sauropod, with a thick and heavy lower jaw.2

Setshwantsho sa Protognathus se se dirilweng ke AI — Setshwantsho se se dirilweng ke AI sa kafa Protognathus e ka tswang e ne e lebega ka gone, se dirilwe ke khomputara go ya ka se borasaense ba se itseng. Ke kakanyo fela: phologolo ya nnete e ka tswa e ne e lebega ka tsela e sele, mme ga go ope yo o itseng mebala ya yona ya nnete.

Mothubi wa ditlhamane

Tlhamane: Some people think Protognathosaurus is a fake or made-up dinosaur because it is so incomplete.

Boammaaruri: It is a real dinosaur, but many scientists consider it a nomen dubium, meaning the name is doubtful because the fossil is too fragmentary to be sure.1

Ya baitseanape ba didino

Leina la saense: Protognathus
Leina le neilwe ke: Zhang 19883
Setlhopha: Melala-meleele
Lelapa / clade: Cetiosauridae3
Thulaganyo: Sauropodomorpha > Sauropoda3
Bogolo jwa matlapa: 171 go ya go 155 dimilione tsa dingwaga (Bajocian / Oxfordian)3
Direkoto tsa difosili: 1 mo The Paleobiology Database3
Go fitlhelwa: In 1988, Zhang Yihun named and described the type species Protognathus oxyodon from a jaw found in China. In 1991, George Olshevsky renamed it Protognathosaurus because the old name was already taken.1
Go sa ntse go ganetsanwa: Scientists debate whether Protognathosaurus is a valid genus or just a nomen dubium, because the only fossil is a piece of jaw.1

Kwa dintlha di tswang teng

Protognathosaurus (en.wikipedia.org)
PBDB Taxon (paleobiodb.org)
Protognathus in The Paleobiology Database (CC BY 4.0): dingwaga, mafelo, dibopego tsa matlapa, thulaganyo.

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